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Finding the Fourth Proportional to 209,716.69, 289,437.60 and 123,699.97

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Solution

The fourth proportional to 209,716.69, 289,437.60 and 123,699.97 is: 170,722.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,716.69 : 289,437.60 = 123,699.97 : x
  2. Step 2: Convert to fraction form
    209,716.69/289,437.60 = 123,699.97/x
  3. Step 3: Cross multiply
    209,716.69x = 289,437.60 × 123,699.97
  4. Step 4: Simplify right side
    209,716.69x = 35,803,422,436.87
  5. Step 5: Solve for x
    x = 35,803,422,436.87/209,716.69
  6. Step 6: Final answer
    x = 170,722.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.